User`s guide

11
 WARNING
The user is advised to carefully read the
section on compressed air diving before
reading the section on EAN dives.
DIVE  EAN: CHECKING THE GENERAL
DIVE PARAMETERS
OXYGEN PARTIAL PRESSURE
When the diver reaches a depth at which the
PPO
2
exceeds the maximum limit entered
in the corresponding parameter (from 1.2
to 1.6 ATM), an alarm condition is triggered,
indicated by:
• blinking depth indication;
• audible alarm.
The alarm persists until the diver has
ascended enough for the PPO
2
to return to
within the programmed limit.
 WARNING
When the max PPO
2
alarm triggers,
ascend immediately until the alarm
condition ceases. In this case you should
finish the dive and return to the surface.
Pay attention to respect all indicated
decompression and safety stops. Mares
recommend not to dive in the follow
12 hours.
EFFECTS ON THE CENTRAL NERVOUS SYSTEM
Oxygen toxicity exposure is monitored by
means of a CNS (Central System Calculation),
based on currently accepted recommendations
for exposure limits.
This toxicity is expressed as a percentage value
which ranges from 0% to 100%. The percentage
CNS value is shown on the display.
An alarm is triggered when it exceeds 75%,
signaled by blinking of the value.
DIVE  EAN: PREDIVE
This operating mode remains active until the
diver goes below 1.2 meters (4 feet). The data
displayed are shown in figure 29.
FIG. 29
NOTE
Before every dive, it is advisable to
enter SETDIVE mode and check all
the parameter settings, and the EAN
parameters in particular.
 WARNING
We advise that when diving you always
put Nemo Air into PREDIVE mode. Early
in your dive, always check that the dive
computer is switched on.
DIVE  EAN: “NODECOMPRESSION” DIVE
When the diver descends below 1.2 meters
(4 ft) Nemo Air automatically switches to DIVE
mode and starts displaying the dive data.
If this mode persists for more than 20 seconds,
Nemo Air will begin recording the dive details
in the LOGBOOK memory.
The data displayed are shown in figures 30
and 31.
FIG. 30
NOTE
The display modes are identical to those
described in the chapter for dives with air.
FIG. 31
Pressing and holding the <+> or <-> key for a
few seconds will temporarily display the dive
settings.
DIVE  EAN: “DECOMPRESSION STOP” DIVE
If the diver does not ascend when the residual
time has expired, Nemo Air switches to
“decompression stop” mode, indicated by the
appearance of the “DECO” message and by an
audible alarm. The data displayed in this mode
are shown in figures 32 and 33.
FIG. 32
FIG 33
Pressing and holding the <+> or <-> key for a
few seconds will temporarily display the dive
settings.
 WARNING
To fully understand how to perform
decompression with EAN, the user should
also carefully read the corresponding
section for compressed-air deco stop dives.
NOTE
The display modes are identical to those
described in the chapter for dives with air.
If you complete an EAN dive, and you wish to
take another dive with air, set the computer
to EAN with %O
2
at 21%. By so doing, the
calculation of the % CNS will remain active.
DIVE  EAN: SURFACING
When the measured depth is less than 1 m
(3 ft), Nemo Air considers the dive to be
suspended (“SURFACING”) and halts the dive
timer.
If the diver does not return below 1.2 m (4 ft)
within the next 3 minutes, the computer
considers the dive to be finished and records
its data in the LOGBOOK. If the diver does re-
descend within 3 minutes, the dive continues and
the dive timer resumes from where it left off.
The data displayed in SURFACING mode are
shown in figure 34.
FIG. 34
 WARNING
If an AIR or EAN dive ends with an
uncontrolled ascent or an omitted stop,
Nemo Air will restrict AIR and EAN modes
for 24 hours and will only allow the
BOTTOM TIME operation mode.
NOTE
The buttons in SURFACING mode are
disabled.
NOTE
To activate the display backlight, press the
<CENTRAL> button.
 WARNING
Do not fly or travel to high altitudes while
the no-fly indication remains active.
DIVE  EAN: SURFACE MODE
The data displayed in SURFACE - EAN mode
are the same as that for SURFACE - AIR mode,
except for the addition of the % CNS value
(figure 35).